You can make a cradle out of 3/4 PVC pipe insulated with foam pipe insulation to protect the plane, to sit in your luggage rack, then use bungee cords or ratchet straps to secure it to the vehicle. With the cradle, the plane will be perfectly horizontal and straight, just as if it were flying through the air. Then drive about 90 MPH down the road to test the covering before putting her in the air............LOL


P.S.

Forgot to mention that you can make this for less than $5 (minus the ratchet straps) in less than 30 minutes.